30201202012123 has 4 divisors (see below), whose sum is σ = 30225735889888. Its totient is φ = 30176668134360.

The previous prime is 30201202012097. The next prime is 30201202012207. The reversal of 30201202012123 is 32121020210203.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30201202012123 is a prime.

It is a super-2 number, since 2×30201202012123² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30201202012123.

It is not an unprimeable number, because it can be changed into a prime (30201202052123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12266937036 + ... + 12266939497.

It is an arithmetic number, because the mean of its divisors is an integer number (7556433972472).

Almost surely, 2^{30201202012123} is an apocalyptic number.

30201202012123 is a deficient number, since it is larger than the sum of its proper divisors (24533877765).

30201202012123 is a wasteful number, since it uses less digits than its factorization.

30201202012123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24533877764.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 30201202012123 its reverse (32121020210203), we get a palindrome (62322222222326).

The spelling of 30201202012123 in words is "thirty trillion, two hundred one billion, two hundred two million, twelve thousand, one hundred twenty-three".